Abstract: Provided is a water-soluble film for molding a packaging capsule which is capable of enclosing chemical agents especially a detergent, has a robust property that prevents leakage of the detergent through suitable thickness and strength and an easy-processing property that keeps robustness not to make a drawn portion break in mold-processing such as deep drawing, further has a soluble resistance that does not make the chemical agent elute within 30 seconds in water at 20° C. and a complete-solubility property within a short period of time in dish-washing and clothes-washing, also has sufficient solubility and complete-solubility properties for film portions around the perimeter edge pasted with a water-soluble film for a top, and exhibits a strong-sealing property to have a temporal stability.

Abstract: An object is to smoothly obtain, through coating of the surface of a metal roll, a polyvinyl alcohol-based resin film that contains a polyvinyl alcohol-based resin and can be used in a water sealing process, and/or to lower the adhesion force of such film on metal seal bar, etc., during heat sealing. As a solution, a polyvinyl alcohol-based resin film containing components A to C below is provided: A. a polyvinyl alcohol-based resin; B. a plasticizer; and C. one or more types selected from sodium polyoxyethylene alkyl ether acetate, disodium polyoxyethylene alkyl sulfosuccinate salt, N-alkyl-N-methyl-ß-alanine sodium salt, and sodium alkane-1,2-diol acetate salt.